code: def __init__(self):
      cache = {}
      cache_get = cache.get
      self.not_in_cache = not_in_cache = object()
  
      def get(_, key):
          return cache_get(key, not_in_cache)
  
      def set_(_, key, value):
          cache[key] = value
  
      def clear(_):
          cache.clear()
  
      self.size = None
      self.get = types.MethodType(get, self)
      self.set = types.MethodType(set_, self)
      self.clear = types.MethodType(clear, self)
  
imports: import inspect
  import warnings
  import types
  import collections
  import itertools
  from functools import lru_cache, wraps
  from typing import Callable, List, Union, Iterable, TypeVar, cast
label_desc: Use image node_id 1 to create a new _UnboundedCache object  with example: obj = _UnboundedCache()